Trying Out Marriage With My Female Friend by Usui Shio — Ongoing

Also known as Onna Tomodachi to Kekkon Shitemita

Onnatomo

Two women who are just friends make a pact... "If both of us are still single in 5 years, let's get married." Five years later, they meet again, and their married life begins.

Serialized in Yuri Hime starting in January 2021.

Chapter 1: Trying out marriage with my female friend released Nov 23 '20 Bread
Chapter 2: The ideals and realities of married life released Dec 29 '20
Chapter 3: Their first outing as a family released Jan 26 '21 Food
Chapter 4: What is true happiness? released Mar 1 '21
Chapter 5: Even when we're apart, we still... released Apr 9 '21
Chapter 6: Loneliness and happiness released Apr 30 '21
Chapter 7: It's alright, I can endure this released Jun 8 '21
Chapter 8: What's important to me released Jul 3 '21
Chapter 9: My family's family released Jul 25 '21